Rheoforming of Mg alloys receives much attention these days. High-quality Mg alloy slurries are required as raw materials for the rheoforming. Recently, a new rheocasting (NRC) process [1] was announced for the production of sound slurries. In the NRC process, the Mg alloy melt is poured into a steel cup. The primary Mg nucleated on the cup wall grows in globular shape under controled cooling condition avoiding constitutional super-cooling. Though the NRC process allows one to make sound slurries, control of its cooling process is not easy.
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